![Allan Gregg in Conversation (Audio) show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/036/132/small/allan-gregg-in-conversation-audio.jpg)
Summary: Buzz Aldrin was the second man to walk on the moon, after Neil Armstrong. Now, he talks about his lifelong fascination with space travel. Aldrin has written about it in a new novel, and now campaigns to launch his dream project: to shuttle people to Mars.